Animo.js - Animo.js is a lightweight, open-source tool that enables developers to manipulate animations and transitions.
Anime.js - Lightweight JavaScript animation library
Move.js - Move.js is a mini Javascript library that provides CSS3 animations.
PykCharts.js - Well designed d3.js charting without the complexity of d3.js
Pixi.js - Fast lightweight 2D library that works across all devices
Ceaser - Ceaser is a handy CSS Easing Animation tool for creating any ease imaginable.